Pump



F. S. vBARKS May 17, 1932.

PUMP

Patented May 17,1932 1,858,979'

UNITED STATES PATENT oFFlcE .FRANK S. BBKS, OF ST. LOUIS, MISSOURI .BUMP

`Application led J'uly A5, 1928. Serial No. 290,379. p

This invention relates to pumps and with given adjustment between the bushing 5 and regard to 'certain more specific features, to pump cylinder 9, so that the suction end of 'pumps forbarreled grease's, oils and the like. said cylinder may be positioned at or near Among the several objects of the invention the bottom of barrels of various lengths.

may be noted the provision of a high-capac- The pump cylinder 9 i made4 in three sec-x 55 ity, grease pump for emptying storage tions, namely, said upper section 7 made of tanks, barrels and like .containers and adapt` vstandard pipe whichis small enough to pass ed to be applied and adjusted to various through a standard size of bung 3 and bush-- A sizes of said containers; the provision of a, in 5, a middle section 13 made of drawn lo device of the class described in which the tu ing of a size which will pass through said 'au motorizing elements are readily removable standard bung 3 without the bushing 5 and from the 'pumping elements perse and the a lower section 15 joined to the middle seci provision of a device of the class described tion 13 by a -coupling 17. Tubing of smooth permitting free lateral movement of the debore is used for the lower section 15, because livery line connected therewith. Other obit functions as a pump c lin'der fora piston g5 jects will be in part'obvious and in part P, and corresponding tu ing is used for the pointed out hereinafter. section 13 for convenience in making up the The invention accordingly comprises the coupling 17 A A elements and combinationsof elements, fea- The lower end of the cylinder is pro-.

20 tures of construction, andarrangements of vided with a suction foot valve 19 adapted '1o parts which will be exemplified 'in the. structo let grease into cylinder 15; but -not out, ture hereinafter described, and the scope ofl and said piston ll? is provided with inwardly the application of which will be indicated in opening ports 21, normally covered by a the following claims. valve plate 23 upon upward movement of the I Inthe'accompanyng drawings, in which pistonand uncovered -by said valve plate 23 7,5 is illustrated one of various possible embodiupon downward movement of the piston. ments of the invention, The ports 21 and' plate 23 with the associat- Fig. 1 is a vertical section, showing the ed valve parts form an outlet valve 25 which pump applied to a grease barrel; also comprises part of the piston assembly Fig. 2 is an #enlarged section showing cer- P. The piston l? is hollow, thereby provid- 30 tain details' of motorizing and pumping ele# ing means for-communication between the ments; a valve'25 and a hollow piston rod 27 whichJ Fig. 3 is a cross section taken substantially' passes longitudinallyI through the pump cylalong 1ine-3-3 of Fig; 2; and, Y- inder 9 and emerges through a pump ilange Fig. 4 is a cross section taken on line 1 -l 29 by way of a stuiiing gland 31.

of Fig. 2. y y 1 Y Within the tube 13, the piston rod 27 is Similar-reference characters indicate corprovided with'a collar 33, welded or otherresponding parts throughout the several `wise fastened thereon. Reacting between views of the drawings. f said collar 33 and said'poupling 17 isa com# y4.0 Referring -now mpre particularly to Fig. pression springs35 serving purposes to be de- 90 1, there is illustrated at numeral 1 a steel scribed and normally tending to 4push the barrel of the usual construction for shipping piston rod J27 upwardly from its Fig. 1 to A greases, oilsV and the like and which includes its Fig.`2 position.

the conventional threaded bung opening 3 It will be seen from the above that if the j into which is threadeda Iclosing cap'(n'ot `piston rod 27-islpermitted to rise from itsgm' shown). In the; present invention al bushing Fig. 1 .position under expansive action off 5 is threadedinto the bung 3, said bushing 5 the'spring 35 that the valve 25 in the piston having a slidablevand adjustableconnection 'will close, atmospheric pressure being aswith the upper section 7 of a pump cylinder sumed to be communicable to the interior of 9. A set screw '11 is used for maintaining a rod 27. An evacuation will thus be effected 100 charge which was previously drawn into the cylinder 15 will be ejected through the valve 25, the piston P and the hollow piston rod 27. The rod 27 is provided at its upper end with a "T coupling 37 the latter being provided with a plug 39 for closing off the upper end thereof. `The arm of the T coupling 37 communicates with aviexible outlet hose 41 for delivering grease to a suitable point, such as mine cars or the like where large quantities of grease are required in relatively loose bearings. It is not intended however to limit the invention' to low pressure work inasmuch as itmay readily be designed for high pressure operation, such as for lubricating automotive equipment.

The reciprocating movement of the hollow'rod 27 is effected and controlled by a removable air en `ne, the lower flange 43 of which is remova ly held'to said pump flange 29 by means of bolts 45. Spaced from the iange 43 by means of spacer columns 47 is an air engine cylinder 49 in which isrecip- 4 rocally movable a piston 51 having a piston red 53 passing out of the lower end of the cylinder 49. The rod 53 is provided outside of the cylinder' 49 with a cross head 55 which is provided with a fork 57 forslidably engaging one tif the spacer columns'47. The

cross head also supports two rods 58 which pass slidably through the end of the cylinder 49 and are fastened into said pistons 51. The effect of the three rods 53, 58 a'nd the action of the cross head is to prevent undesirable rotation of t be here noted that the plug 39 of the T cousary is to unbolt the franges 29, 43, thus perpling 37 merely abuts the lower end of the piston rod 53, so that forremoving the air engine from the pump .the only action necesall positions of the latter.. The port. 59- 1s alternately covered and uncovered by a I. t `sho\ulder 63 on a valve stem 65, said shoulder being'contiguous to an exhaust dellector 67. The end of the passage in which the valve stem65 moves is used as an exhaust. Inlet of air iseiected through a passage 69 acres 'which moves a peripheral recess 71 alternat- "5""ing with the covering and uncovering of the exhaust port 59. An air hose 73 (Figil) is piston assembly. It should` used to bring air to the passage 69. '0 air inlet is provided beneath the piston 51.

Peripheral recesses 75 spaced apart the distance of the valve movement are cooperated with by spring pressed and sidewardly located ball detents 77 (Fig. 4) for providing positive full-stroke positioning of the valve. The nut 78 also functions as a stop against .the valve body and a cup 80 screwed thereon.

The valve 65 isA provided with a stem 79 which is guided at its lower end in a hole through the engine flange 43.

In order to operate the valve, a bracket 81 is fastened to the rods 57 and-reaches sidewardly to fork over a slidable washer 83 on vthe stem 79. Springs 85 are interposed between the fork washer 83 and stops 89 on the valve stem, wherebv a driving connection is had between the bracket 81 and ,the valve stem, such that the piston 51 may veffect a full-stroke or` such a fraction thereof as is `desired before the valve. changes position.

This is due to the resilient action of the springs 85 which under the given adjustment are increasingly vloaded as movement of bracket 81 advances, until the reaction of the respective spring i85 resets the valve at the end of. the desired stroke. The length of the stroke of piston 51 may be varied by adjusting the positions of the stops 89.

Operation of the device is as follows:

The capis unscrewed from the bung of the barrel and the bushing. 5 substituted therefor. The set screw 11 is loosened so that the foot valve -may take up a position at-or near the bottom of theH container l. The set screw is then tightened. By turning air into the passage 69 from hose 73 the piston y51 is caused Ato be pressed down so that the rod 53 thereof presses'down on the plug 39 and forces the hollowpiston rod 27 downwardly against the reaction of spring 35. This results in the foot valve 19 closing,y and the charge in cylinder 15 being forced througl valve 25, piston P, hollow rod 27 T coupling 37 and out to the hose 41 from whence it is delivered to the desired location.

Aftenthe piston 51 has descended to a predetermined position, the bracket 81 engages the'lower valve` spring 85 and after suitable the engine pistonbrod 53. This action returns both the pump and the engine parts for, another stroke. Air beneath the piston 5,3 is not trapped inasmuch as it leaks out at the unpacked bearing between the rod 53 lustrative and not in a limiting sense.

piston in the cylinder,a hollow piston ro and the cylinder end-. The piston P in re turning causes opening of the foot valve 19 and closing ofthe piston valve 25,Athereby drawing another charge into the cylinder 15. However, the charge already in the hollow rod 27 is unaffected.

It will be seen that one of the advantages of this construction is that the hose il-may be pulled around through an arc of substantially 120 without straining it, because the rod 27 may turn independently of the engine rod 53 at the abutment between them.

BThe purpose of the gland 31 is to provide for a possibility'of leakage past piston Should the piston sible that the space thereabove in the pump cylinder 9 would bezome filled up and that grease would flow out of the joint between 20 the pump flange 29 and rod 27. The gland 31 prevents this.y Alsoa return port 91 is formed in the cylinder 9 so that the gathered grease may return to the container 1 instead of stopping the operation of the pump. lt is, however, quite probable that the piston P can be kept tight enough to prevent substantial leakage, and therefore eliminate the necessity for the gland 31 and port 91.

lt will be seen that the ready removal featureof the air engine permits of removing one'defective engine and applying a perfect one without removing the pump per se from the container.' This is of advantage in mine. work where it is diliicult to make repairs where operations are carried on. The pum'p per se comprises'a very simple mechanism and there is small possibility ofit being deranged, especially in its protected position within the container.

present engine piston and pump piston area ifatio is four 'to one, that this may be increased or decreased s'o as -to give higher or lower outlet pressures.

It is also enough clearance between the bushing 5 and pipe 7 that air may enter the barrel to provideatmospheric pressure on the contained lubricant as the same is pumped.

In view of the above, it will be seen that the several objects of the invention are vachieved* and other advantages results attained.

As many changes coul'd be made in carrying out the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or-shownin the accompanying drawings shall be interpreted asil- I claim: Y .1. A pump comprisinga pump cylinder, a

for. driving said piston,^means for sucking 55 charges into the cylinder and'discharging P become leaky it is pos-` ]t is to be understood that although the.

to be understood thatl there is them through said piston rod-upon recipro-rl for reciprocating the for effecting a return cation thereof,.means piston rod comprising an engine discharge stroke of the piston,

spring for effecting a suction stroke of the I0 P, tion thereof, means for reciprocating the p iston rod-comprising a reciprocating air engine having a piston rod and a piston, means for removably fastening said Aengine to said pumping elements, the piston rod thereof. abutting a portionof said hollowpump piston rod, whereby simultaneous reciprocation of the engine piston rod and hollow pump piston rod may be effected but whereby the latter is independently rotatable of the former.4

3. A pump comprising `a pump cylinder, a piston in the cylinder, a hollow piston rod for driving said piston, means for sucking charges into the cylinder and discharging them throuvh said piston roduipon reciprocation thereo meansfor reciprocating the -piston rod co prising having a piston rod and a piston, means for removably fastening said engine to .said pumping elements, thej-piston rod thereof abutting a portion of said hollow .pump piston rod, whereby simultaneous reciprocationa reciprocating air engine of the engine p1ston rbd andl hollow pump -A piston rod may be effected but. whereby the latter is independently rotatable' of the former, a full-stroke valve mechanism for the engine permitting intermittent application of airl behind I i turn spring associated with the pump for returning all reciprocating parts to their initialpositions.

4. vA pump lcomprising a pump cylinder and piston in the cylinder, a hollow piston rod for driving said piston, means forV sucking charges from the container into the cylinder and discharging them through said piston rodupon reciprocation reciprocating the piston rod `comprising a reciprocating air engine having' a piston rod and a piston, means for fastening said engine to said pumping elements, the piston rod thereof abutting al portion of said hollowv pump I piston. rod; whereby simultaneous y reciprocation of the engine piston rod and the pump piston rod may be e'ected loutv whereby the'latter is independently rotatable d of the former, a full-stroke valve mechanism for the engine soconnected and' driven by the engine as to "require non-rotation of sald ion one side 'of the engine piston l and intermlttentrelease thereof and a rethereof, means for engine piston and piston rod, said valve mechanism causing intermittent application of air behind one side of the engine piston only and intermittent release thereof and a return spring associated with the pump for 5 returning all the reciprocating parts to their initial positions.- 5. A. pump comprising a pump cylinder, a piston in the cylinder, a reciprocating hollow piston rod for driving said piston, means for lo effecting entrance of charges into the cylinder and discharging them through said pisf ton rod upon reciprocation of the rod, means for reciprocating the rod and an articulation between said reciprocating means and the u rod, permitting relative rotation between the two.

6. A pump comprising a pump cylinder, a piston in the cylinder, a reciprocating'hollow .piston rod for driving said piston, means aio for effecting entrance of charges into the cylinder and discharging them through said piston rod upon reciprocation of the rod, means for vreciprocating the rod, an articulation between said reciprocating means and the rod, permitting relative rotation between the two, said piston rod having a laterally directed outlet for dischar e purposes, said outlet being adapted to be a justably directed becalisxe of'said articulation. l. d

pump compi-ism a pump c 1n er, a. hollow, reciprocating, piston rod gxtendmg into said cylinder, said rod having an outlet for delivery of :Huid from said cylinder, an engine adapted to r' ciprocate the rodand an articulation betwee said. engine and the, rod permitting relative rotation between the two. N

8. A pump comprising a pum c linder, a piston rod recipr eating in said dylinder and extending there om, an engine pump adapted to reciprocate said rod and an articulation between the engine and said rod permitting relative rotation between the two.

In testimony whereof, I have signed In name to this specification 'this 26th day of June, 1928.

FRAN K B ARKS. 

